package Ch9;

public class Calculator {
	public double add(double x, double y){
		return x + y;
	}
	public double minus(double x, double y){
		return x - y;
	}
	public double multi(double x, double y){
		return x * y;
	}
	public double divide(double x, double y){
		return x / y;
	}
}
